Question

Compare and contrast the life cycles and mode of nutrition among fungi, animals and plants.

Answer 1

Fungi-

Fungus is a sexually reproducing organism which has a haploid phase alternating with diploid phase. The haploid phase ends with the nuclear fusion while the diploid fusion begins with the formarion of zygote and the diploid cells result in the formation of fusion of two haploid sex cells.

Fungi have a heterotrophic mode of nutrition. They cannot ingest solid food but absorb it directly through the cells membrane either by living as saprophytes or parasites.

Animals -

The four stages of lifecycle in animals are birth , growth, reproduction and death.Most of the animals appear simmilar to their adult ones during the birth, but some animals including insects ,go through a rafical transformations called metamorphosis during their growing stage.

Animals can not prepare their own food hence they depend on others for their food. Hence they have a heterotrophic mode of nutrition ,that is they obtain food from other living organisms may be plants or animals.

plants -

The plant starts life as a seed, that germinates and grows into a plant. The mature plant flowers ,which are fertilised and produce seeds in a seedpot or also in fruits. The plant eventually dies ,leaving seeds to germinate into new plants. Plants follow a various ways to disperse their seeds into new and favourable habbitats for their growth.

The mode of nutrition that is found in plants is autotrophic. This helps the plant to produce their own food with the help of raw materials and minerals that are obatained from the soil in the presence of sunlight and chlorophyll. Plant is the source of energy for various forms of life on earth.

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